Nimodipine to Prevent LH Surge During Ovulation Induction: Blinded Placebo-controlled RCT (NIMO)
The main purpose of this study is to test the effectiveness of nimodipine in preventing a luteinizing hormone (LH) surge in women undergoing ovulation induction with clomiphene citrate. It is important to prevent the premature LH surge in controlled ovarian stimulation to allow adequate recruitment of follicles, proper maturation of a dominant follicle before ovulation, and effectively time insemination with semen to allow fertilization of a mature egg to occur.
The investigators are also conducting this study to determine medication side effect profile (including lightheadedness or dizziness from low blood pressure or rapid heart rate, headache, and nausea), patient treatment compliance, and clinical pregnancy (positive pregnancy test and ultrasound evidence of fetal heart rate). Finally, LH and follicle stimulating hormone (FSH) serum levels will be measured to determine effect of nimodipine on these hormones.
As a calcium channel blocker, nimodipine has been shown to block calcium mediated release of gonadotropin releasing hormone in animal and preliminary human studies. The investigators hypothesize that nimodipine, a calcium channel blocker, will prevent or delay the LH surge during controlled ovarian stimulation cycles using clomiphene citrate in subfertile patients undergoing assisted reproduction with intrauterine insemination (IUI).
|Unexplained Infertility Polycystic Ovarian Syndrome Anovulatory||Drug: Placebo Drug: Nimodipine|
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Investigator)
Primary Purpose: Treatment
|Official Title:||Using Nimodipine, a Calcium Channel Blocker, to Prevent LH Surge in Women Undergoing Controlled Ovarian Stimulation and Intrauterine Insemination: a Double-blinded, Randomized Controlled Study|
- LH surge [ Time Frame: The presence or absence of an LH surge after start of intervention ]Compare the change between placebo treated and nimodipine treated patients by the presence or absence of an LH surge on intervention Day 1 and Day 2. LH surge will be determined by serum LH levels at least two times the baseline serum LH (baseline serum LH = (cycle day 3 serum [LH] + cycle day 7 serum [LH])/2).
- Side effect profile [ Time Frame: Starting day 0 of intervention to pregnancy test (approximately 15 days) ]Medication side effect profile including: symptomatic hypotension (Note: vital signs will be recorded), symptomatic tachycardia (Note: vital signs will be recorded), headache, nausea. These will be self-reported with constructed questionnaire.
- Gonadotropin levels [ Time Frame: Intervention day 0 to ovulation (approximately 1-7 days) ]Calculated changes in serum LH, FSH, and estradiol levels between patients in nimodipine and placebo arms
|Study Start Date:||September 2012|
|Study Completion Date:||October 2015|
|Primary Completion Date:||April 2014 (Final data collection date for primary outcome measure)|
Placebo Comparator: Placebo
All subjects in both arms will receive Clomid 100 mg tablets by mouth for 5 days prior to receiving either placebo comparator or active comparator. Placebo comparator subjects will receive 8 total doses of liquid placebo orally 4 times a day for 8 total doses in pre-filled liquid placebo containing syringes
Active Comparator: Nimodipine
All subjects in both arms will receive Clomid 100 mg tablets by mouth for 5 days prior to receiving either placebo comparator or active comparator. Active comparator subjects will receive Nimodipine 30mg liquid orally 4 times a day for 8 total doses in pre-filled syringes
Other Name: Nimotop
After enrollment, subjects will be randomized to Placebo Comparator or Active Comparator. All subjects will receive Clomid 100 mg for 5 days for the purpose of ovarian follicle recruitment. Intervention will be initiated once ovarian follicle maturation has been documented (≥1 ovarian follicle size of ≥ 17mm) and the absence of a premature LH surge has been confirmed - this will be classified as intervention day 0. Subjects will receive their assigned comparator (Placebo or Active) according the schedule below:
- Intervention Day 0 - noon / afternoon / bedtime (3 doses)
- Intervention Day 1 - morning / noon / afternoon / bedtime (4 doses)
- Intervention Day 2 - morning (1 dose) Serum hormone levels and ultrasound examination will occur on days 0,1 and 2 for all subjects.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01672801
|United States, Massachusetts|
|Waltham, Massachusetts, United States, 02451|
|Principal Investigator:||Alan S Penzias, MD||Beth Israel Deaconess Medical Center / Boston IVF|